Canadian officials on Tuesday banned single-person train crews for dangerous cargo. The Brotherhood of Locomotive Engineers and Trainmen is encouraging U.S. officials to mandate at least two crew members.

There's nothing to indicate that extra crew would have prevented the July 6 disaster in Quebec. Canadian officials say the train rolled away because of insufficient brake force.

Nonetheless, the disaster put focus on a Maine-based train operator that placed one person in charge of a train carrying 72 tankers filled with crude oil.

In the U.S., the Federal Railroad Administration doesn't mandate the size of crew for freight trains but says trains with a one-person crew are "very rare."

Thousands of California acres are ablaze as firefighters battle at least 21 wildfires throughout the state, but while many of those fires are small or mostly contained, the wind and heat that are spreading the Rocky Fire in Northern California -- and...